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Late Miocene onset of the modern Antarctic Circumpolar Current

dc.rights.licenseopenen_US
hal.structure.identifierGRC Geociencies Marines
dc.contributor.authorEVANGELINOS, Dimitris
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorETOURNEAU, Johan
hal.structure.identifierImperial College London
dc.contributor.authorVAN DE FLIERDT, Tina
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCROSTA, Xavier
hal.structure.identifierLaboratoire d'études en Géophysique et océanographie spatiales [LEGOS]
dc.contributor.authorJEANDEL, Catherine
dc.contributor.authorFLORES, José-Abel
dc.contributor.authorHARWOOD, David
hal.structure.identifierGRC Geociencies Marines
dc.contributor.authorVALERO, Luis
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorDUCASSOU, Emmanuelle
hal.structure.identifierUniversity of Tasmania [Hobart] [UTAS]
dc.contributor.authorSAUERMILCH, Isabel
hal.structure.identifierNorwegian Research Center [NORCE]
hal.structure.identifierBjerknes Centre for Climate Research [BCCR]
dc.contributor.authorKLOCKER, Andreas
hal.structure.identifierGRC Geociencies Marines
dc.contributor.authorCACHO, Isabel
hal.structure.identifierGRC Geociencies Marines
dc.contributor.authorPENA, Leopoldo
hal.structure.identifierImperial College London
dc.contributor.authorKREISSIG, Katharina
hal.structure.identifierGéosciences Environnement Toulouse [GET]
dc.contributor.authorMATHIEU, Benoit
hal.structure.identifierLaboratoire d'études en Géophysique et océanographie spatiales [LEGOS]
dc.contributor.authorBELHADJ, Moustafa
hal.structure.identifierGRC Geociencies Marines
dc.contributor.authorPAREDES, Eduardo
hal.structure.identifierGRC Geociencies Marines
dc.contributor.authorGARCIA-SOLSONA, Ester
dc.contributor.authorLÓPEZ-QUIRÓS, Adrián
dc.contributor.authorSALABARNADA, Ariadna
dc.contributor.authorESCUTIA, Carlota
dc.date.accessioned2025-03-31T12:51:58Z
dc.date.available2025-03-31T12:51:58Z
dc.date.issued2024-01-18
dc.identifier.issn1752-0894en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/205839
dc.description.abstractEnThe Antarctic Circumpolar Current plays a pivotal role in global climate through its strong influence on the global overturning circulation, ocean heat and CO 2 uptake. However, when and how the Antarctic Circumpolar Current reached its modern-like characteristics remains disputed. Here we present neodymium isotope and sortable silt records from sediment cores in the Southwest Pacific and South Indian oceans spanning the past 31 million years. Our data indicate that a circumpolar current like that of today did not exist before the late Miocene cooling. These findings suggest that the emergence of a homogeneous and deep-reaching strong Antarctic Circumpolar Current was not linked solely to the opening and deepening of Southern Ocean Gateways triggering continental-scale Antarctic Ice Sheet expansion during the Eocene-Oligocene Transition (∼34 Ma). Instead, we find that besides tectonic pre-conditioning, the expansion of the Antarctic Ice Sheet and sea ice since the middle Miocene Climate Transition (∼14 Ma) played a crucial role. This led to stronger density contrast and intensified Southern Westerly Winds across the Southern Ocean, establishing a vigorous deep-reaching circumpolar flow and an enhanced global overturning circulation, which amplified the late Cenozoic global cooling. The Antarctic Circumpolar Current (ACC), driven by the interplay among Southern Westerly Winds (SWW), buoyancy forcing and bathymetry 1 , is the largest ocean current on Earth. It actively regulates the transport of heat, moisture, carbon and nutrients between the Southern Ocean and the low-latitude regions, thus substantially influencing atmospheric CO 2 and global climate 1. To assess the future response of the ACC to ongoing climate warming and its impacts on Antarctic Ice Sheet dynamics, global circulation and climate 2 , it is critical to unravel
dc.language.isoENen_US
dc.title.enLate Miocene onset of the modern Antarctic Circumpolar Current
dc.typeArticle de revueen_US
dc.identifier.doi10.1038/s41561-023-01356-3en_US
dc.subject.halPlanète et Univers [physics]/Sciences de la Terre/Géochimieen_US
bordeaux.journalNature Geoscienceen_US
bordeaux.page165 - 170en_US
bordeaux.volume17en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamPALEOen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-04454247
hal.version1
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
workflow.import.sourcehal
dc.rights.ccCC BYen_US
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